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# Autodetect if SSE4.1 can be used. If so, the assumption is, so can the other
# SSE version (SSE 2.0, SSSE 3.0).
include(CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_FLAGS "")
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
set(CMAKE_REQUIRED_FLAGS "-msse4.1")
endif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
check_cxx_source_compiles("
#include <xmmintrin.h>
#include <smmintrin.h>
#include <tmmintrin.h>
int main() { return 0; }"
SSE_FOUND
)
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